Pumice is the only rock that floats on water.
14
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
A cubic yard of air weighs about 2 pounds at sea level.
31
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Diamonds can be shattered with a hammer.
-104
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71